Venus

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volcanoesvolcanoes
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Venus has lava tubes!
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Venus has lava tubes!

A long undersurface tunnel discovered in old NASA data

Philip Plait
Philip Plait
Hubble Space TelescopeHubble Space Telescope
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The most difficult planet Hubble’s ever seen
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The most difficult planet Hubble’s ever seen

In 1995 it slewed almost too close to the Sun

Philip Plait
Philip Plait